Cage for parison molds



May 28, 1935.

l CAGE FOR PARIsQN MoLDs Filed April 27, 1932 l 2 sheets-Sheet 2 A. w. BEEsoN 2,003,064

Patented May 28, 1935 PATENT oFFlcE CAGE Foa rAnIsoN Moms Arthur W. Beeson, Washington, Pa., assigner to Hazel-Atlas Glass Company, Wheeling,` W. Va., a corporation o! West Virginia Application April 27,1932, Serial No. 607,860

l Claims.

This invention relates to cages for glass molds, and particularly for parison molds used in that type of forming machine in which the parison mold is telescopically arranged with respect to the blow mold, so as to permit the parison mold to be raised into engagement with the neck ring, and thereafter lowered so as to leave the parison suspended and to permit it to be inclosed by th e blow mold.

In the use of parison molds in this general type of forming machine, considerable diiculty has been encountered by reason of the upward expansion of the parison mold, which destroys the vexact t between the neck ring and the parison mold, when the latter is in its raised position, and causes jamming between these parts, thereby interrupting the smooth functioning of the machine.

It has been suggested previously that a spring be interposed'between the parison mold and its support, to compensate for changes in the vertical dimensions of the parison molds or other parts, but such an arrangement is not successful practically, because while 'the parison moldis in its elevated position it is subjected to the pres.- sure of a pressing plunger, and for the proper functioning of such plunger the support for the parison mold should be rigid.

The primary object of the present invention is to provide some means, such as a cage or the like, to support the parisonymold from its upper end and permit it to expand freely downward, whereby the relation between thel neck ring and the upper end of the parison mold when in elevated position will remain fixed, what'- ever the expansion of the parison mold may be.

Other objects and advantages of the invention will be apparent to those skilled in the art from the following description when taken in connection with the accompanying drawings, in

which Figure 1 is a vertical section through a parison mold and its supporting means. u

Figure 2 is a side elevational view thereof partly in section.

Figure 3 is a horizontal sectional view taken on line 3--3 of Figure 2;

Figure 4 is a plan view ofthe cage perse, which supports the mold; and v Figure 5 is a fragmentary plane view of -a single table machine, and illustrating more or less diagrammatically a plurality ofglass lforming units mounted thereon. l

ReferringV to .the drawings more in detail, the numeral I indicates a portion of the conventional mold table on which the molds and related parts are supported and carried to the charging station, pressing station, etc. This table is provided with the usual pivotal supports 2 for the neck ring sections, the blow mold bottoms 3, 5 blow molds 25, and all the other parts common to this type of forming machine. The table is also provided with openings 4 to'permit raising and lowering the parison mold 5 into and out of cooperative relation with the neck ring 6. 10 The usual valve 5 is mounted in the bottom of the parison mold, and is held in place by the bar 5". The usual pressing plunger is indicated by numeral l.

Numeral 8 refers to an arm fixed 8' slidable on a rod 8". The arm is raised and lowered at the proper times by any desired mechanism. In the present machine the arm is raised by an air cylinder (not shown), and lowered by means of cam track 9 and cooperating roller 9' go' carried by -the sleeve 8'. After the arm has been elevated it is preferably supported by an anvil 8"' during the pressing operation. All of this mechanism is old and well known and a'detailed description is unnecessary. 25

Mounted in the arm 8 forvvertlcal adjustment, is a stud I0 on which is secured a collar I I, as by means of a cotter pin I2. Mounted on this collar II is a cage or pot I3 adapted to support the parison mold 5.

The cage I3 is provided with a thickened, in-` wardly directed annular base portion I4 having a threaded opening I5. This portion of the cage is slotted as indicated at I6 and a clamping bolt I'I is threaded into it through an opening I8. 35 The cage is screwed on the collar I I, and then by tightening up on the bolt I'I the cage is locked ln position.

The upper end of the cage is provided with an inwardly directed bead I9 adapted to snap into an 40 annular notch formed adjacent the mouth oi the parison mold, and in order to provide the necessary resiliency for this purpose the upper edge of the cage is provided with a plurality of verti- 'cal slots 20, there being four such slots shown in the cage, and to assist in the free circulation of u to a. sleeve 15 air the cage is preferably provided with a plurality of openings 2|.

From` the foregoing description it will be apparentv that the expansion of the parison mold must be downward, as it is supported at its upper end and is free at its lower end. Consequently, when the cage and mold are moved upward by the travel of the roller 9' on the cam track 9, the

. mold will always be brought to exactly the same point of elevation, irrespective of the tempera ture oi the mold, so that there will be no'jamming of parts. It will be understood, of course, that the cageand mold are capable of being adjusted up or down, through the vertical adjust-g ment of the stud ill and collar Il which, per se,

is old.

It will also be apparent that while in accordance with the present invention the mold is always brought to a ilxed position when elevated, regardless of mold expansion or contraction, it is also rigidly supported in such elevated position, so that the pressing operation may be properly performed. g

It will also be apparent that by reason of the specific structure of the upper end of the cage, a parison mold can be quickly removed and another mold quickly snapped into position.

It should be understood that while a specic structure of the cage has been illustrated and described, yet the invention is in no manner limited to the particular structure, but relates broadlyto the provision of means to permit the free expansion of the parison mold downwardly, thereby preventing the jamming of parts, and the consequent interruption oi manufacture of glassware, which has been a common occurrence heretofore, particularly when rather long parsion molds are being used.

In accordance with the patent statutes I have described what I now believe to be the preferred embodiment oi the invention, but obviously it is subject to many changes and modiilcations, all of which I aim to include within the scope of the appended claims.

What I claim is: Y

1. A glass forming machine comprising a single rotary table, a plurality of 'glass forming umts carried by the table. each unit including a parison mold, a blow mold and a neck ring, both molds adapted to be brought into cooperative relation with the neck ring. means for elevating the parison mold into cooperative relation with the neck ring, and means supporting the parison mold solely from its top, whereby the parison mold may expand freely downward from its top to prevent jamming, said supporting means throughout its length being substantially within the greatest diameter of the parison mold.

2. A glass forming machine comprising a single rotary table, a plurality of glass forming units carried by the table, each unit including a pari-y son mold, a blow mold and a neck ring, both molds adapted to be brought into cooperative relation with the neck ring, an elevating member, means i'or raising and lowering said member, and a cage mounted on said member, lsaid parison mold suspended at its top from the .top oi said cage to permit free downward expansion of the parison mold, said cage throughout its length being substantially within the greatest diameter of the parison mold.

3. A glass forming machine comprising a single rotary table, a plurality of glass forming units carried by the table, each unit including a parison mold, a blow mold and a neck-ring, .both molds adapted to be brought into cooperative relation with the neck ring, an elevating member, meansior raising and lowering the elevating member, a cage mounted on the elevating member,l and a snap connection between f the top of the cage and the top of the parison mold. 1

4. A glass forming machine comprising a single rotary table,a plurality of glass forming umts carried by the table, each unit including a parison mold, a blow mold and a neck ring, both molds adapted to be brought into cooperative relation with the neck ring, an elevating member, means for raising and lowering. the elevating member, a cage mounted on said member, said cage provided with openings to pernit free circulation ot lair, and a snap connection between the top o! the cage and the top oi' the parison mold.

ARTHUR W. BEESON. 

